Eufy RoboVac LR30 Hybrid Replacement Battery 14.4V 3350mAh

Eufy RoboVac LR30 Hybrid — 14.4V Li-ion Replacement Battery (T2996011)

This 14.4V 3350mAh (48.24Wh) Li-ion battery replaces the original T2996011 cell pack in the Eufy RoboVac LR30 Hybrid and LR30 Hybrid+ robotic vacuum cleaners. It fits the four-cell series configuration (CMICR18650F9M-4S1P) that powers the navigation system, suction motor, and mopping module. Capacity figures are taken directly from product data, not extrapolated from third-party listings.

• LR30 Hybrid and LR30 Hybrid+ compatibility: Both models run the same 14.4V nominal voltage rail with an identical connector and BMS handshake profile. The 4S1P cell arrangement is common across both variants, which is why a single part number — T2996011 — covers the full LR30 Hybrid range.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on an LR30 Hybrid unit, verifying the BMS communicated cleanly with the dock charger, that the protection circuit tripped correctly under overcurrent conditions, and that cell voltage balanced across all four cells at end of charge.
• Dock charging habit on the LR30 Hybrid: Do not leave the RoboVac sitting on the dock permanently between sessions. The LR30 Hybrid's dock applies a trickle charge once full, and continuous low-level charging accelerates capacity fade in 18650 Li-ion cells. Charge to full, then remove from the dock until the next scheduled clean.

Suction dropping before the battery indicator reaches low on the LR30 Hybrid

The LR30 Hybrid's suction motor is the single largest current draw in the system. When the filter is partially blocked or the brush roll is restricted, motor current climbs and the pack voltage sags below what the motor controller expects — triggering an apparent power drop even when the battery indicator still shows mid-charge. The BMS reads voltage under load, not open-circuit state of charge, so a worn cell pack or a dirty filter will produce the same symptom. Clean the filter and brush roll first; if suction recovers immediately, the battery was not the cause. If suction remains weak after cleaning, measure pack voltage under load — a healthy 4S Li-ion pack should hold above 14.0V when the motor is running.

Motor cuts out mid-clean and then recovers after a few seconds

This is a BMS overcurrent trip, not a dead battery. When the RoboVac encounters deep carpet or a partial blockage, current draw spikes sharply. The protection circuit on the T2996011 pack cuts output to prevent cell damage, then resets once current falls back within limits — which is why the vacuum restarts on its own after a brief pause. A new battery will trip on the same overcurrent event if the blockage is still present. Clear the brush roll, check the filter for restriction, and verify the inlet path is unobstructed before concluding the pack is at fault. If trips continue on a clean machine, confirm pack voltage is at or above 14.4V fully charged before ruling out cell degradation.